Five new species of Zingiber (Zingiberaceae) from Borneo

Abstract

Recent collections from Sabah and Sarawak have revealed a wide species diversity among the Bornean members of the genus Zingiber. Four previously unknown and one incompletely known species of the genus are presented. Z. vinosum is a lowland species characterized by its burgundy colour of the lower surface of the leaves. Z. lambii was collected in primary lowland forest on ultramafic soil while Z. argenteum was collected in primary lowland forest on limestone. Both are characterized by their silvery leaves and orange inflorescences. Z. pendulum, found in primary mountain forest, has pending leafy stems and a deeply split labellum with very well developed side‐lobes. Z. latifolium, found in secondary mountain forest, is vegetatively distinct by its broad leaves with a densely pubescent margin Z. vinosum, Z. Iambii, Z. pendulum and Z. latifolium are from Sabah and Z. argenteum is from Sarawak.

A new species of Zingiber (Zingiberaceae) from Vietnam

“…argenteum and Z. lambii (Theilade & Mood 1997). The dark burgundy colour of the back of the leaves has so far been described for 3 species of Zingiber namely Z. vinasum (Theilade & Mood 1997), Z. larsenii (Theilade 1999) and Z. recurvato (Tony 1987).. To find these two unusual features combined in Z. collinsii is remarkable indeed. The beautiful foliage and colourful inflorescences render Z. collinsii a great potential as an ornamental plant.…”

Zingiber vinosum: Mood, J., Theilade, I. & Olander, S.B.

“…This species is endemic to Sabah (Malaysia) on Borneo and known from three georeferenced collections (ZRC 2019, Theilade and Mood 1997). The extent of occurrence (EOO) and area of occupancy (AOO) are small (84 and 12 km 2 , respectively) and there is a decline in the quality of habitat.…”

“…This is species is endemic to Sabah (Malaysia) on Borneo where it has been found in Sandakan District (Theilade and Mood 1997, Lamb et al 2013, ZRC 2019. According to available georeferenced herbarium collections (ZRC 2019) the extent of occurrence (EOO) is 84 km 2 and the area of occupancy (AOO) 12 km 2 .…”

“…The type was collected in Sepilok Forest Reserve (Lamb et al 2013, Theilade andMood 1997). The species is also known from Danum Valley Protection Forest Reserve (ZRC 2019, Protected Planet 2019).…”

Six new species of Zingiber (Zingiberaceae) from Borneo

“…A key to 18 species including three widely cultivated species, which are not native to Borneo, and four incompletely known species was provided. Since then six species from Sabah and two from Sarawak, have been described (Theilade & Mood 1997a, b, Theilade & Christensen 1998. During field work in 1991 to 1995 several new species were collected in Sabah and Sarawak.…”